Wrong bounding box? when using the color black in an animation

[oli4warin]

In certain constellations there seems to be a problem with the color black in show_animation:
As in the example below, the large black square in the second frame is not fully displayed.
If you change the color from black to red, everything works as desired.

from pytamaro import (
    overlay,
    ellipse, rectangle, 
    red, green, black, 
    show_animation
)

show_animation(
    [
        rectangle(120,120,black),
        overlay(ellipse(10,10,green),rectangle(120,120,black))
    ], 
    duration=1000
)

It might be related to the default background color in generating the gif.

[lucach]

Hi @oli4warin, thanks for reporting this!

We bumped into this weird behavior a while ago (internal issue: https:/LuCEresearchlab/pytamaro-web/issues/242). It turns out to be a bug in the optimizer of Pillow's GIF encoder. We reported the issue upstream and it has already been fixed. The bugfix will be part of Pillow 11, which is scheduled to be released on October 15.

I will release a new version of PyTamaro as soon as the new version of Pillow is released. I'm keeping this issue open to track this process.